## What is the difference between selection sort and bubble sort and insertion sort?

Selection sort: repeatedly pick the smallest element to append to the result. Insertion sort: repeatedly add new element to the sorted result. Bubble sort: repeatedly compare neighbor pairs and swap if necessary.

## Which is best between selection and insertion sort and why?

Among both of the sorting algorithm, the insertion sort is fast, efficient, stable while selection sort only works efficiently when the small set of elements is involved or the list is partially previously sorted.

What are the differences between Quick sort and insertion sort algorithms?

Insertion sort is faster for small n because Quick Sort has extra overhead from the recursive function calls. Insertion sort is also more stable than Quick sort and requires less memory.

### What is best case complexity of insertion sort and selection sort?

3. Insertion Sort

Sorting Algorithm Time Complexity
Best Case Worst Case
Bubble Sort O(N) O(N2)
Selection Sort O(N2) O(N2)
Insertion Sort O(N) O(N2)

### Which is better selection sort or insertion sort?

Insertion sort runs much more efficiently if the array is already sorted or “close to sorted.” Selection sort always performs O(n) swaps, while insertion sort performs O(n2) swaps in the average and worst case. Selection sort is preferable if writing to memory is significantly more expensive than reading.

How many comparisons does selection sort make?

In general, the average number of comparisons per pass in selection sort will always be one half of the number of items to be sorted. For eight items, we have 1/2(82 + 8) = 1/2(64 + 8) = 1/2(72) = 36 comparisons.

## Which type of sorting is more efficient?

Quicksort. Quicksort is one of the most efficient sorting algorithms, and this makes of it one of the most used as well. The first thing to do is to select a pivot number, this number will separate the data, on its left are the numbers smaller than it and the greater numbers on the right.

## How it is different from selection sort?

The main difference between bubble sort and selection sort is that the bubble sort operates by repeatedly swapping the adjacent elements if they are in the wrong order while the selection sort sorts an array by repeatedly finding the minimum element from the unsorted part and placing that at the beginning of the array.

Why selection sort is slower than insertion sort?

Selection sort is a simple but inefficient sorting algorithm. It has always quadratic complexity, in the worst case as well as in the best case. On the other hand, insertion sort is quadratic at worst but linear at best. Therefore it is expected that, in some cases, it will perform better than selection sort.

### Which is better insertion or selection sort?

Which comparison sort gives the most comparison?

Some of the most well-known comparison sorts include: Quicksort. Heapsort. Shellsort.

## What is the advantage of insertion sort?

Insertion sort has several advantages including: The pure simplicity of the algorithm. The relative order of items with equal keys does not change. The ability to sort a list as it is being received.

## Which sorting algorithm is comparison?

Some of the most well-known comparison sorts include:

• Quicksort.
• Heapsort.
• Shellsort.
• Merge sort.
• Introsort.
• Insertion sort.
• Selection sort.
• Bubble sort.

Which sort is the fastest?

Quicksort
The time complexity of Quicksort is O(n log n) in the best case, O(n log n) in the average case, and O(n^2) in the worst case. But because it has the best performance in the average case for most inputs, Quicksort is generally considered the “fastest” sorting algorithm.